Coverage not best. Moi mum at home some area no reception.  Take it as budget line.      Myself using Simba. roaming partners in truelyasia bad. But their roaming had many data.  +Me got many months extra free for prepay so sticking with them for a while. 

Need find msf for $$$ to get license for begging... Lol 

my FIL got SIMBA plan   it maybe works ok if you have newer phone supporting VOLTE   if not u gonna keep helping to troubleshoot why cannot call out/in   in the end he port out 

then need pay admin fee processing fee   then the beggar will ask    does money come first or begging come first